<template>
  <div>
    <!-- 面包屑导航区域 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>添加商品</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 卡片视图 -->
    <el-card>
      <!-- 提示区域 -->
      <el-alert title="添加商品信息" type="info" center show-icon :closable="false">
      </el-alert>
      <!-- 步骤条区域 -->
      <el-steps :space="200" :active="activeIndex - 0" finish-status="success" align-center>
        <el-step title="基本信息"></el-step>
        <el-step title="商品参数"></el-step>
        <el-step title="商品属性"></el-step>
        <el-step title="商品图片"></el-step>
        <el-step title="商品内容"></el-step>
        <el-step title="完成"></el-step>
      </el-steps>

      <!-- tab栏区域 -->

      <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="100px" label-position="top">
        <el-tabs v-model="activeIndex" :tab-position="'left'" :before-leave="beforeTabLeave" @tab-click="tabClicked">
          <el-tab-pane label="基本信息" name="0">
            <el-form-item label="商品名称" prop="goods_name">
              <el-input v-model="addForm.goods_name"></el-input>
            </el-form-item>
            <el-form-item label="商品价格" prop="goods_price">
              <el-input v-model="addForm.goods_price" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品重量" prop="goods_weight">
              <el-input v-model="addForm.goods_weight" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品数量" prop="goods_number">
              <el-input v-model="addForm.goods_number" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品分类" prop="goods_cat">
              <el-cascader expand-trigger="hover" :options="catelist" :props="cateProps" v-model="addForm.goods_cat" @change="handleChange">
              </el-cascader>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品参数" name="1">
            <!-- 渲染表单的Item项 -->
            <el-form-item :label="item.attr_name" v-for="item in manyTableData" :key="item.attr_id">
              <!-- 复选框组 -->
              <el-checkbox-group v-model="item.attr_vals">
                <el-checkbox :label="cb" v-for="(cb, i) in item.attr_vals" :key="i" border></el-checkbox>
              </el-checkbox-group>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品属性" name="2">
            <el-form-item :label="item.attr_name" v-for="item in onlyTableData" :key="item.attr_id">
              <el-input v-model="item.attr_vals"></el-input>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品图片" name="3">
            <!-- action 表示图片要上传到的后台API地址 -->
            <el-upload :action="uploadURL" :on-preview="handlePreview" :on-remove="handleRemove" list-type="picture" :headers="headerObj" :on-success="handleSuccess">
              <el-button size="small" type="primary">点击上传</el-button>
            </el-upload>
          </el-tab-pane>
          <el-tab-pane label="商品内容" name="4">
            <!-- 富文本编辑器组件 -->
            <quill-editor v-model="addForm.goods_introduce"></quill-editor>
            <!-- 添加商品的按钮 -->
            <el-button type="primary" class="btnAdd" @click="add">添加商品</el-button>
          </el-tab-pane>
        </el-tabs>
      </el-form>

    </el-card>

    <!-- 图片预览 -->
    <el-dialog title="图片预览" :visible.sync="previewVisible" width="50%">
      <img :src="previewPath" alt="" class="previewImg">
    </el-dialog>
  </div>
</template>
<script>
import _ from 'lodash'
import { async } from 'q';
export default {
    data(){
        return{
            activeIndex:'0',
            //添加商品的表单数据对象
            addForm:{
                goods_name:'',
                goods_price:0,
                goods_weight:0,
                goods_number:0,
                //商品所属的分类数组
                goods_cat:[],
                //图片的数组
                pics:[],
                //商品的详情描述
                goods_introduce:'',
            },
                addFormRules: {
                goods_name: [
                  { required: true, message: '请输入商品名称', trigger: 'blur' }
                ],
                goods_price: [
                  { required: true, message: '请输入商品价格', trigger: 'blur' }
                ],
                goods_weight: [
                  { required: true, message: '请输入商品重量', trigger: 'blur' }
                ],
                goods_number: [
                  { required: true, message: '请输入商品数量', trigger: 'blur' }
                ],
                goods_cat: [
                  { required: true, message: '请选择商品分类', trigger: 'blur' }
                ]
              },
            //商品分类列表
            catelist:[],
            cateProps:{
                lable:'cat_name',
                value:'cat_id',
                children:'children',
                // expandTrigger:'hover'
            },
            //动态参数列表数据
            manyTableData:[],
            //静态参数列表数据

            onlyTableData:[],
            //上传图片的url地址
            uploadURL:'http://www.klxin.cn:8888/api/private/v1/upload',
            //图片上传组件的headers请求头对象
            headerObj:{
              Authorization: window.sessionStorage.getItem('token')
            },
            previewPath: '',
            previewVisible:false
        }
    },
    created(){
        this.getCateList()
    },
   methods: {
    // 获取所有商品分类数据
    async getCateList() {
      const { data: res } = await this.$http.get('categories')

      if (res.meta.status !== 200) {
        return this.$message.error('获取商品分类数据失败！')
      }

      this.catelist = res.data
      // console.log(this.catelist)
    },
    // 级联选择器选中项变化，会触发这个函数
    handleChange() {
      // console.log(this.addForm.goods_cat)
      if (this.addForm.goods_cat.length !== 3) {
        this.addForm.goods_cat = []
      }
    },
    beforeTabLeave(activeName, oldActiveName) {
      // console.log('即将离开的标签页名字是：' + oldActiveName)
      // console.log('即将进入的标签页名字是：' + activeName)
      // return false
      if (oldActiveName === '0' && this.addForm.goods_cat.length !== 3) {
        this.$message.error('请先选择商品分类！')
        return false
      }
    },
    async tabClicked() {
      // console.log(this.activeIndex)
      // 证明访问的是动态参数面板
      if (this.activeIndex === '1') {
        const { data: res } = await this.$http.get(
          `categories/${this.cateId}/attributes`,
          {
            params: { sel: 'many' }
          }
        )

        if (res.meta.status !== 200) {
          return this.$message.error('获取动态参数列表失败！')
        }

        // console.log(res.data)
        res.data.forEach(item => {
          item.attr_vals =
            item.attr_vals.length === 0 ? [] : item.attr_vals.split(' ')
        })
        this.manyTableData = res.data
      } else if (this.activeIndex === '2') {
        const { data: res } = await this.$http.get(
          `categories/${this.cateId}/attributes`,
          {
            params: { sel: 'only' }
          }
        )

        if (res.meta.status !== 200) {
          return this.$message.error('获取静态属性失败！')
        }

        // console.log(res.data)
        this.onlyTableData = res.data
      }
    },
    //处理图片预览区域
    handlePreview(file){
      console.log(file);
      this.previewPath=file.response.data.url
      this.previewVisible=true
      

    },
    //处理移除图片的操作
    handleRemove(file){
      // console.log(file);
      //获取将要删除的图片的临时路径
      const filePath=file.response.data.tmp_path
      //2.从 pic 数组中,找到这个图片对应的索引值
      const i = this.addForm.pics.findIndex(x=> x.pic===filePath)
      //3.调用数组的splice方法 把图片信息对象 从pics数组中移除
      this.addForm.pics.splice(i,1)
      // console.log(this.addForm);
      
      
    },
    //监听图片上传成功的事件
    handleSuccess(response){
      // console.log(response);
      //1.拼接得到一个图片信息对象
      const picInfo= { pic: response.data.tmp_path}
      //2.将图片信息对象 push到pics数组中
      this.addForm.pics.push(picInfo)
      // console.log(this.addForm);
    },
    //添加商品
    add(){
// console.log(this.addForm);
this.$refs.addFormRef.validate(async valid=>{
  if(!valid) {
    return this.$message.error('请填写必要的表单项!')
  }
  //执行添加的业务逻辑
  //lodash clonedeep(obj)
  const form= _.cloneDeep(this.addForm)
  form.goods_cat=form.goods_cat.join(',')
  // console.log(form);
  //处理动态参数
  this.manyTableData.forEach(item=> {
    const newInfo= {
      attr_id: item.attr_id, 
      attr_value: item.attr_vals.join(" ")
    }
    this.addForm.attrs.push(newInfo)
  })
  //处理静态属性
  this.onlyTableData.forEach(item => {
    const newInfo={ 
      attr_id: item.attr_id, 
      attr_value: item.attr_vals
    }
    this.addForm.attrs.push(newInfo)
  })
  form.attrs=this.addForm.attrs
  console.log(form);
  //发起请求 添加商品
  //商品的名称必须是唯一的
  const { data: res }= await this.$http.post('goods',form)
  if(res.meta.status !== 201) {
    return this.$message.error('添加商品失败')
  }
  this.$message.success('添加商品成功')
  this.$router.push('/goods')
      })
    }
  },
    computed:{
        cateId(){
          if(this.addForm.goods_cat.length===3){
              return this.addForm.goods_cat[2]
          }
          return null
        }
    }
}
</script>
<style lang="less" scoped>
  .previewImg{
    width: 100%;
  }
  .btnAdd{
    margin: 15px;
  }
</style>style